WO2015016180A1 - 基板処理方法、基板処理装置、半導体装置の製造方法及び記録媒体 - Google Patents
基板処理方法、基板処理装置、半導体装置の製造方法及び記録媒体 Download PDFInfo
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- WO2015016180A1 WO2015016180A1 PCT/JP2014/069826 JP2014069826W WO2015016180A1 WO 2015016180 A1 WO2015016180 A1 WO 2015016180A1 JP 2014069826 W JP2014069826 W JP 2014069826W WO 2015016180 A1 WO2015016180 A1 WO 2015016180A1
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- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/67034—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for drying
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/448—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for generating reactive gas streams, e.g. by evaporation or sublimation of precursor materials
- C23C16/4481—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for generating reactive gas streams, e.g. by evaporation or sublimation of precursor materials by evaporation using carrier gas in contact with the source material
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/46—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for heating the substrate
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/52—Controlling or regulating the coating process
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- H01L21/02222—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates the layer being characterised by the precursor material for deposition the precursor containing a compound comprising Si the compound comprising silicon and nitrogen the compound being a silazane
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- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
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Definitions
- the present invention relates to a substrate processing method, a substrate processing apparatus, a semiconductor device manufacturing method, and a recording medium.
- LSI element isolation is performed by a method in which a gap such as a groove or a hole is formed between elements to be separated adjacent to each other on silicon (Si) serving as a substrate, and an insulator is deposited in the gap.
- Si silicon
- an oxide film is often used.
- SiO film silicon oxide film
- the SiO film can be formed by oxidation of the Si substrate itself, chemical vapor deposition (CVD), insulating coating (Spin On Dielectric: SOD), or the like.
- oxides are embedded in a fine structure, especially when the oxide is embedded in a gap structure deep in the vertical direction or narrow in the horizontal direction. The limit is being reached.
- an SOD method a coating insulating material containing an inorganic or organic component called SOG (Spin On Glass) is used. This material has been used in LSI manufacturing processes before the advent of CVD oxide films, but the processing technique has a processing dimension of about 0.35 ⁇ m to 1 ⁇ m.
- a reforming step of performing a heat treatment at about 400 ° C. in a nitrogen atmosphere may be performed.
- An object of the present invention is to provide a technique capable of improving characteristics of a film formed on a substrate and improving manufacturing throughput.
- a substrate processing method comprising: a step, and a drying processing step of heating the substrate at a second temperature higher than the first temperature and not higher than the pre-baking temperature.
- a processing container that accommodates a substrate in which a film having a silazane bond is formed and prebaked on the film, a processing gas supply unit that supplies a processing gas to the substrate, a heating unit that heats the substrate, After the substrate is heated to the first temperature and the processing gas is supplied to the substrate to modify the film having the silazane bond, the second temperature is higher than the first temperature and equal to or lower than the temperature at the time of pre-baking.
- a substrate processing apparatus is provided that includes the processing gas supply unit and a control unit that controls the heating unit so as to heat the substrate to a temperature.
- a method for manufacturing a semiconductor device comprising: a process; and a drying process that heats the substrate at a second temperature that is higher than the first temperature and equal to or lower than the pre-baking temperature.
- a computer-readable recording medium on which a program for causing a computer to execute a procedure and a drying processing procedure in which the substrate is heated at a second temperature higher than the first temperature and not higher than the pre-baking temperature is provided.
- the present invention it is possible to improve the characteristics of the film formed on the substrate and improve the manufacturing throughput.
- a substrate with a polysilazane film formed on the surface is treated with a treatment liquid or a treatment gas, a plurality of foreign matters (particles) are generated and may adhere to the treated substrate. It was. Further, the present inventors have found a problem that due to the generation of foreign matter, the quality cannot be maintained and miniaturization may be hindered. Further, the present inventors have found a problem that the substrate processing that ensures the quality cannot be continued, and the manufacturing throughput may deteriorate.
- the polysilazane film is formed by applying a polysilazane solution and pre-baking.
- pre-baking it is difficult to completely remove the solvent and impurities in the polysilazane coating film. Therefore, in the subsequent modification process, the solvent remaining in the pre-baked polysilazane film is detached from the film, released as outgas in the processing container, and reattached to the substrate to cause a reaction. May end up.
- polysilazane having a low molecular weight may be detached from the coating film, released as outgas into the processing container, and reattached to the substrate to react with the remaining solvent. As a result, it may adhere to the substrate surface as SiO foreign matter or impurities.
- the inventors dried the substrate at a temperature equal to or lower than the pre-baking temperature after the polysilazane coating in the drying treatment step after modifying the polysilazane film, or the treatment. It has been found that the above-mentioned problems can be solved by increasing the purity of the liquid or combining these methods.
- FIG. 1 is a schematic configuration diagram of a substrate processing apparatus according to the present embodiment, and shows a processing furnace 202 portion in a longitudinal section.
- FIG. 2 is a schematic longitudinal sectional view of the processing furnace 202 provided in the substrate processing apparatus according to the present embodiment.
- the processing furnace 202 includes a processing container (reaction tube) 203.
- the processing vessel 203 is made of a heat-resistant material such as quartz (SiO 2 ) or silicon carbide (SiC), and is formed in a cylindrical shape with an upper end and a lower end opened.
- a processing chamber 201 is formed in a hollow cylindrical portion of the processing container (reaction tube) 203.
- the processing chamber 201 is configured to be able to accommodate wafers 200 as substrates in a state where they are aligned in multiple stages in a vertical posture in a horizontal posture by a boat 217 described later.
- a seal cap 219 serving as a furnace port lid that can hermetically seal (close) the lower end opening (furnace port) of the process container 203 is provided below the process container 203.
- the seal cap 219 is configured to contact the lower end of the processing container 203 from the lower side in the vertical direction.
- the seal cap 219 is formed in a disc shape.
- a processing chamber 201 serving as a substrate processing space mainly includes a processing container 203 and a seal cap 219.
- a boat 217 as a substrate support portion is configured to hold a plurality of wafers 200 in multiple stages.
- the boat 217 includes a plurality of support columns 217 a that hold a plurality of wafers 200.
- the plurality of support columns 217a are respectively installed between the bottom plate 217b and the top plate 217c.
- the plurality of wafers 200 are aligned in a horizontal posture and aligned with each other by the support columns 217a, and are held in multiple stages in the tube axis direction.
- the outer diameter of the top plate 217 c is formed so as to be larger than the maximum outer diameter of the wafers 200 held by the boat 217.
- silicon oxide (SiO 2 ), silicon carbide (SiC), aluminum oxide (AlO), aluminum nitride (AlN), silicon nitride (SiN), zirconium oxide are used as the constituent materials of the columns 217a, the bottom plate 217b, and the top plate 217c.
- a non-metallic material with high thermal conductivity such as (ZrO) is used.
- ZrO thermal conductivity
- the support columns 217a and the top plate 217c may be formed of a metal material such as stainless steel (SUS).
- SUS stainless steel
- a coating such as ceramic or Teflon (registered trademark) may be formed on these metal members.
- a heat insulator 218 made of a heat-resistant material such as quartz or silicon carbide is provided at the lower part of the boat 217 so that heat from the first heating unit 207 is not easily transmitted to the seal cap 219 side. Yes.
- the heat insulator 218 functions as a heat insulating member and also functions as a holding body that holds the boat 217.
- the heat insulator 218 is not limited to the one in which a plurality of heat insulating plates formed in a disk shape are provided in a multi-stage in a horizontal posture, and may be a quartz cap formed in a cylindrical shape, for example. Further, the heat insulator 218 may be considered as one of the constituent members of the boat 217.
- a boat elevator is provided as an elevating unit that moves the boat 217 up and down and conveys the boat 217 into and out of the processing container 203.
- the boat elevator is provided with a seal cap 219 that seals the furnace port when the boat 217 is raised by the boat elevator.
- a boat rotation mechanism 267 that rotates the boat 217 is provided on the side of the seal cap 219 opposite to the processing chamber 201.
- the rotation shaft 261 of the boat rotation mechanism 267 is connected to the boat 217 through the seal cap 219.
- the boat rotation mechanism 267 is configured to rotate the wafer 200 by rotating the boat 217.
- a first heating unit 207 for heating the wafer 200 in the processing container 203 is provided outside the processing container 203 in a concentric shape surrounding the side wall surface of the processing container 203.
- the first heating unit 207 is supported and provided by the heater base 206.
- the first heating unit 207 includes first to fourth heater units 207a to 207d. Each of the heater units 207a to 207d is provided along the arrangement direction of the wafers 200 in the processing container 203.
- first to fourth temperature sensors 263a to 263d such as thermocouples are provided as temperature detectors for detecting the temperature of the wafer 200 or the surroundings for each of the heater units 207a to 207d as heating units. ing.
- the temperature sensors 263a to 263d are respectively provided between the processing container 203 and the boat 217.
- the temperature sensors 263a to 263d may be provided so as to detect the temperature of the wafer 200 located at the center of the plurality of wafers 200 heated by the heater units 207a to 207d, respectively.
- a controller 121 (to be described later) is electrically connected to the first heating unit 207 and the temperature sensors 263a to 263d via the temperature controller 400 shown in FIG.
- the controller 121 supplies power supplied to the heater units 207a to 207d to a predetermined value based on the temperature information respectively detected by the temperature sensors 263a to 263d so that the temperature of the wafer 200 in the processing container 203 becomes a predetermined temperature.
- Each is configured to be controlled at timing.
- the controller 121 is configured to be able to perform temperature setting and temperature adjustment individually for each of the heater units 207a to 207d.
- a processing liquid supply nozzle 501 is provided between the processing container 203 and the first heating unit 207.
- the processing liquid supply nozzle 501 is made of, for example, quartz having a low thermal conductivity.
- the treatment liquid supply nozzle 501 may have a double tube structure.
- the processing liquid supply nozzle 501 is disposed along the side of the outer wall of the processing container 203.
- the tip (downstream end) of the processing liquid supply nozzle 501 is airtightly connected to the top (upper end opening) of the processing container 203.
- a supply hole 502 is provided at the tip of the processing liquid supply nozzle 501 connected to the upper end opening of the processing container 203.
- the supply hole 502 is configured to supply the processing liquid flowing in the processing liquid supply nozzle 501 toward the vaporizer 217 d provided on the upper portion of the boat 217 accommodated in the processing container 203.
- the supply hole 502 is configured to drop the treatment liquid toward the vaporizer 217d.
- the configuration of the supply hole 502 is not limited to such an aspect, and for example, the processing liquid may be ejected from the supply hole 502 toward the vaporizer 201d.
- the gas supply unit mainly includes a vaporizer 217d as a vaporization unit, a treatment liquid supply nozzle 501, and a supply hole 502 as a treatment liquid supply unit.
- the above-described gas supply unit may include an oxygen-containing gas supply unit 602.
- the oxygen-containing gas supply unit 602 includes a gas supply pipe 602c that supplies an oxygen-containing gas.
- the gas supply pipe 602c is provided with a valve 602a, a gas flow rate controller (mass flow controller) 602b, and a valve 601d in this order from the upstream side.
- the oxygen-containing gas for example, a gas containing at least one of oxygen (O 2 ) gas, ozone (O 3 ) gas, and nitrous oxide (NO) gas is used.
- the gas supply pipe 602c is provided with a gas heating unit 602e that heats the oxygen-containing gas.
- the gas heating unit 602e is configured to heat the oxygen-containing gas flowing through the gas supply pipe 602c to a temperature of about 80 to 150 ° C., preferably about 100 to 120 ° C., for example.
- a temperature of about 80 to 150 ° C. preferably about 100 to 120 ° C., for example.
- vaporization of the treatment liquid supplied to the vaporizer 217d can be assisted.
- liquefaction of the processing gas supplied into the processing container 203 can be suppressed.
- the downstream end of the processing liquid supply pipe 289a for supplying the processing liquid is connected to the upstream end of the processing liquid supply nozzle 501.
- the treatment liquid supply pipe 289a is provided with a liquid flow rate control unit 300 and a purge gas supply unit 601 in order from the upstream direction.
- the liquid flow rate control unit 300 includes a fluid pipe 310a that supplies a processing liquid.
- the downstream end of the liquid pipe 310a is connected to the upstream end of the processing liquid supply pipe 289a.
- the fluid pipe 310a is provided with a reserve tank 301, an auto valve 302a, a hand valve 303a, a filter 304, an auto valve 302b, a liquid flow rate controller (LMFC) 305, and valves 302c and 302d in this order from the upstream side.
- the upstream end of the liquid pipe 310 a is provided so as to be positioned below the liquid level of the processing liquid stored in the reserve tank 301.
- the reserve tank 301 is connected to a pressure gas supply unit, a gas discharge unit, and a processing liquid discharge unit.
- the capacity of the reserve tank 301 is preferably 1 to 5 liters, for example, 2 liters.
- the capacity of the reserve tank 301 is preferably set to a capacity that allows a substrate processing process described later to be executed continuously twice or more.
- the pressurized gas supply unit includes a gas pipe 310b that supplies the pressurized gas.
- the gas pipe 310b is provided with an auto valve 302e, a gas flow rate controller (MFC) 309, auto valves 302f and 302g, and a hand valve 303b in this order from the upstream side.
- the downstream end of the gas pipe 310 b is provided so as to be positioned above the liquid level of the processing liquid stored in the reserve tank 301.
- At least the gas pipe 310b, the auto valve 302g, and the MFC 309 constitute a pressurized gas supply unit.
- the auto valves 302e and 302f and the hand valve 303b may be included in the pressurized gas supply unit.
- the gas discharge unit includes a gas pipe 310c.
- the gas pipe 310c is provided with a hand valve 303c and an auto valve 302h in order from the upstream side.
- the upstream end of the gas pipe 310 c is provided so as to be positioned above the liquid level of the processing liquid stored in the reserve tank 301.
- At least the gas discharge part is constituted by the gas pipe 310c and the auto valve 302h.
- the hand valve 303c may be included in the gas discharge unit.
- a drain pipe 310e is connected between the auto valves 302c and 302d in the fluid pipe 310a.
- An auto valve 302i is provided in the drain pipe 310e.
- a gas pipe 310d is connected to the filter 304. The downstream end of the gas pipe 310d is connected to the downstream side of the auto valve 302i in the drain pipe 310e.
- the gas pipe 310d is provided with an auto valve 302j.
- the filter 304 is configured to take out the gas contained in the processing liquid supplied from the reserve tank 301 and send only the liquid to the LMFC 305 through the fluid pipe 310a.
- the gas contained in the processing liquid is discharged through the gas pipe 310d and the drain pipe 310e.
- the processing liquid sent out from the filter 304 is flow-controlled by the LMFC 305 and supplied into the processing liquid supply pipe 289a.
- the purge gas supply unit 601 includes a purge gas supply pipe 601c that supplies a purge gas.
- the purge gas supply pipe 601c is provided with an auto valve 601a, an MFC 601b, and an auto valve 601d in order from the upstream side.
- the downstream end of the purge gas supply pipe 601c is connected to the processing liquid supply pipe 289a.
- an inert gas having low reactivity with respect to the wafer 200 and the film formed on the wafer 200.
- nitrogen (N 2 ) gas, Ar (argon) gas, He (helium) is used.
- a rare gas such as a gas or Ne (neon) gas is used.
- the upstream end of the first exhaust pipe 231 for exhausting the gas in the processing chamber 201 is connected to the lower side of the processing container 203.
- the first exhaust pipe 231 is provided with an APC (Auto Pressure Controller) valve 255 as a pressure regulator and a vacuum pump (exhaust device) 246a in order from the upstream side.
- a second exhaust pipe 243 is connected to the upstream side of the APC valve 255 in the first exhaust pipe 231.
- the second exhaust pipe 243 is provided with an APC valve 240, a separator 244, and a vacuum pump (exhaust device) 246b in order from the upstream side.
- a liquid recovery tank 247 is connected to the separator 244.
- the inside of the processing chamber 201 is evacuated by the negative pressure generated by the vacuum pumps 246a and 246b.
- the APC valves 255 and 240 are open / close valves capable of exhausting and stopping exhaust in the processing chamber 201 by opening and closing the valves, and adjusting the pressure in the processing chamber 201 by adjusting the valve opening. It is also a pressure regulating valve that can A pressure sensor 223 as a pressure detector is provided on the upstream side of the APC valve 255 in the first exhaust pipe 231.
- a controller 121 (see FIG. 3) described later is electrically connected to the pressure sensor 223. The controller 121 controls the valve opening degree of the APC valves 255 and 240 based on the pressure information detected by the pressure sensor 223, and controls at a desired timing so that the pressure in the processing chamber 201 becomes a desired pressure. It is configured as follows.
- the first exhaust pipe 231, the APC valve 255, and the pressure sensor 223 constitute a first exhaust part.
- the vacuum pump 246a may be included in the first exhaust part.
- the second exhaust pipe 243 and the APC valve 240 constitute a second exhaust part. It may be considered that the pressure sensor 223, the separator 244, and the vacuum pump 246b are included in the second exhaust part upstream of the connection part of the first exhaust pipe 231 with the second exhaust pipe 243.
- either or both of the first exhaust part and the second exhaust part are also simply referred to as an exhaust part.
- the hydrogen peroxide gas refers to, for example, a gasified or mist of hydrogen peroxide water that is liquid hydrogen peroxide.
- the reliquefaction of the hydrogen peroxide gas often occurs in a region other than the region heated by the first heating unit 207 in the processing container 203.
- the first heating unit 207 is provided so as to heat the wafer 200 in the processing container 203 as described above. Therefore, the region in the processing container 203 in which the wafer 200 is accommodated is appropriately heated by the first heating unit 207. However, the region other than the accommodation region of the wafer 200 in the processing container 203 is not easily heated by the first heating unit 207. As a result, the region other than the region heated by the first heating unit 207 in the processing container 203 is likely to be relatively low temperature, and the hydrogen peroxide gas is cooled and re-liquefied when passing through this low temperature region. May end up.
- liquid generated by re-liquefaction of the hydrogen peroxide gas may accumulate on the bottom of the processing container 203, for example, the upper surface of the seal cap 219 or the like. For this reason, the reliquefied hydrogen peroxide reacts with the seal cap 219, and the seal cap 219 may be damaged.
- the liquid on the seal cap 219 is discharged from the furnace port to the processing container 203. It may fall outside. For this reason, members around the furnace port of the processing furnace 202 may be damaged, and workers or the like may not be able to safely enter the vicinity of the processing furnace 202.
- Hydrogen peroxide solution is, for example, using hydrogen peroxide (H 2 O 2 ) as a raw material (reactant) that is solid or liquid at room temperature, using water (H 2 O) as a solvent, and dissolving hydrogen peroxide in water. It is manufactured by letting. It is known that the boiling point (vaporization point) of hydrogen peroxide is higher than the boiling point of water. For this reason, the liquid produced by re-liquefying the hydrogen peroxide gas may have a higher concentration of hydrogen peroxide than the hydrogen peroxide solution supplied to the processing container 203.
- the liquid generated by re-liquefying the hydrogen peroxide gas is vaporized again in the processing container 203, and vaporized gas is generated again (hereinafter, this gas is also referred to as “revaporized gas”).
- this gas is also referred to as “revaporized gas”.
- hydrogen peroxide and water have different vaporization points, and water is first evaporated and exhausted. For this reason, the re-vaporization gas may have a higher concentration of hydrogen peroxide than the hydrogen peroxide gas immediately after being supplied to the wafer 200.
- the concentration of the hydrogen peroxide gas may be non-uniform in the processing vessel 203 where the re-vaporized gas is generated.
- the concentration of hydrogen peroxide gas tends to be higher at the bottom in the processing vessel 203 where high-concentration hydrogen peroxide water is likely to accumulate, compared to other locations.
- the substrate processing among the plurality of wafers 200 in the processing container 203 becomes non-uniform, and the characteristics of the substrate processing may vary.
- the substrate processing between lots may be non-uniform.
- the hydrogen peroxide concentration may increase due to repeated liquefaction and re-vaporization of hydrogen peroxide. As a result, there is a risk of explosion and combustion due to the high concentration of hydrogen peroxide water.
- the second heating unit 280 is provided so as to heat a region other than the region heated by the first heating unit 207. It is supposed to be provided.
- the second heating unit 280 is preferably provided on the outer side (outer periphery) of the lower portion of the processing container 203 so as to surround the side wall surface of the processing container 203 concentrically.
- the second heating unit 280 causes the hydrogen peroxide gas flowing from the upper side (upstream side) to the lower side (downstream side) of the processing container 203 toward the first exhaust pipe 231 to flow downstream (i.e., in the processing container 203). It is configured to be heated in a region in which the heat insulator 218 in the processing container 203 is accommodated.
- the second heating unit 280 is attached to members around the furnace port of the processing vessel 203, that is, a seal cap 219 that seals the lower end opening of the processing vessel 203, a lower portion of the processing vessel 203, and a bottom portion in the processing vessel 203.
- the member which comprises the lower part of the processing container 203 such as the heat insulator 218 arrange
- positioned may be heated.
- the second heating unit 280 is configured to heat a member constituting a region below the position of the bottom plate 217b when the boat 217 is carried into the processing chamber 201.
- a controller 121 described later is electrically connected to the second heating unit 280.
- the controller 121 sets the temperature in the processing container 203 to a temperature (for example, 100 ° C. to 300 ° C.) that can suppress liquefaction of the processing gas (hydrogen peroxide gas) on the downstream side in the processing container 203.
- the power supplied to the second heating unit 280 is controlled at a predetermined timing.
- the heating of the furnace port portion of the processing container 203 by the second heating unit 280 is continuously performed at least while the processing liquid is supplied into the processing container 203.
- the process is continuously performed after the wafer 200 is loaded into the processing container 203 and before being unloaded.
- the second heating unit 280 By performing heating using the second heating unit 280, it is possible to prevent liquefaction of the processing gas at the furnace port and adhesion of particles and impurities to the furnace port. Further, by starting the heating using the second heating unit 280 immediately after the wafer 200 is carried in, the time for preparing the environment before supplying the processing gas can be shortened.
- the controller 121 which is a control unit (control means), is configured as a computer including a CPU (Central Processing Unit) 121a, a RAM (Random Access Memory) 121b, a storage device 121c, and an I / O port 121d.
- the RAM 121b, the storage device 121c, and the I / O port 121d are configured to exchange data with the CPU 121a via the internal bus 121e.
- an input / output device 122 configured as a touch panel or the like is connected to the controller 121.
- the storage device 121c includes, for example, a flash memory, a HDD (Hard Disk Drive), and the like.
- a control program that controls the operation of the substrate processing apparatus, a program recipe that describes the procedure and conditions of the substrate processing described later, and the like are stored in a readable manner.
- the process recipe is a combination of functions so that a predetermined result can be obtained by causing the controller 121 to execute each procedure in a substrate processing step to be described later, and functions as a program.
- the program recipe, the control program, and the like are collectively referred to simply as a program.
- the RAM 121b is configured as a memory area (work area) in which programs, data, and the like read by the CPU 121a are temporarily stored.
- the I / O port 121d includes the LMFC 305, MFC 309, 601b, 602b, auto valves 302a to 302j, 601a, 601d, 602a, 602d, shutters 252, 254, 256, APC valves 255, 240, vacuum pumps 246a, 246b,
- the pressure sensor 223, the first heating unit 207 (207a, 207b, 207c, 207d), the second heating unit 280, the temperature sensors 263a to 263d, the boat rotation mechanism 267, the blower rotation mechanism 259, and the like are connected.
- the CPU 121a is configured to read and execute a control program from the storage device 121c, and to read a process recipe from the storage device 121c in response to an operation command input from the input / output device 122 or the like. Then, the CPU 121a adjusts the flow rate of the processing liquid by the LMFC 305, the flow rate adjustment operation of the gas by the MFCs 309, 601b, and 602b, and the auto valves 302a to 302j, 601a, 601d, and 602a in accordance with the contents of the read process recipe.
- the controller 121 is not limited to being configured as a dedicated computer, and may be configured as a general-purpose computer.
- an external storage device storing the above-described program for example, a magnetic tape, a magnetic disk such as a flexible disk or a hard disk, an optical disk such as a CD or DVD, a magneto-optical disk such as an MO, a semiconductor memory such as a USB memory or a memory card
- the controller 121 according to the present embodiment can be configured by installing a program in a general-purpose computer using the external storage device 123.
- the means for supplying the program to the computer is not limited to supplying the program via the external storage device 123.
- the program may be supplied without using the external storage device 123 by using communication means such as the Internet or a dedicated line.
- the storage device 121c and the external storage device 123 are configured as computer-readable recording media. Hereinafter, these are collectively referred to simply as a recording medium.
- recording medium when the term “recording medium” is used, it may include only the storage device 121 c alone, may include only the external storage device 123 alone, or may include both.
- a polysilazane (PHPS) coating process (T20) and a pre-baking process (T30) are sequentially performed on the wafer 200.
- PHPS polysilazane
- T20 polysilazane
- T30 pre-baking process
- the solvent is removed from the polysilazane applied to the surface of the wafer 200. Specifically, the solvent is evaporated from the polysilazane coating film by heating the wafer 200 coated with polysilazane to a temperature of about 70 ° C. to 250 ° C. This heat treatment is preferably performed at about 150 ° C.
- a silicon substrate having a concavo-convex structure having a fine structure on the surface can be suitably used as the wafer 200.
- the polysilazane supplied to the surface of the wafer 200 is filled at least in the recesses (grooves), and a silicon (Si) -containing film having a silazane bond is formed in the grooves.
- a Si-containing film having a silazane bond is formed, and a reforming process is performed by supplying a vaporized hydrogen peroxide gas as a processing gas to the wafer 200 on which the film is pre-baked. An example of performing is described.
- a substrate having a fine structure is a substrate in which a deep groove (recess) is formed in a direction perpendicular to the surface of the substrate, or a groove having a narrow width of, for example, about 10 nm to 30 nm in a direction parallel to the surface of the substrate. It refers to a substrate on which (concave portions) are formed. That is, the substrate having a fine structure means a substrate having a concavo-convex structure with a high aspect ratio formed on the surface thereof.
- a substrate processing step performed as one step of the semiconductor device manufacturing process according to the present embodiment will be described with reference to FIGS.
- This step is performed by the above-described substrate processing apparatus.
- hydrogen peroxide gas is used as a processing gas, and a silicon-containing film formed on a wafer 200 as a substrate is modified (oxidized) into a silicon oxide film (SiO film).
- SiO film silicon oxide film
- hydrogen peroxide water Compared with water vapor (water, H 2 O), hydrogen peroxide water has a high activation energy and a large number of oxygen atoms contained in one molecule, and thus has a strong oxidizing power. Therefore, by using hydrogen peroxide gas as the processing gas, oxygen atoms (O) can reach the deep part (bottom part of the groove) of the film formed in the groove on the surface of the wafer 200. Therefore, the degree of the modification process can be made more uniform between the surface portion and the deep portion of the film on the wafer 200. That is, more uniform substrate processing can be performed between the surface portion and the deep portion of the film formed on the wafer 200, and the dielectric constant and the like of the film after the modification processing can be made uniform in the thickness direction. it can.
- hydrogen peroxide gas as the processing gas, the reforming process can be performed at a low temperature, and the performance degradation of the circuit elements formed on the wafer 200 can be suppressed.
- hydrogen peroxide as a reactant is vaporized or mist (that is, hydrogen peroxide in a gas state) is called hydrogen peroxide gas, and hydrogen peroxide in a liquid state is treated with a treatment liquid (excessive hydrogen peroxide gas). It is called hydrogen oxide water.
- Vacuum evacuation is performed by at least one of the vacuum pumps 246a and 246b so that the inside of the processing container 203 has a desired pressure (degree of vacuum). Further, the valves 602 a and 601 d are opened, and the oxygen-containing gas is supplied from the oxygen-containing gas supply unit 602 into the processing container 203. Preferably, the oxygen-containing gas is supplied after being heated to, for example, 100 ° C. to 120 ° C. by the gas heating unit 602e. At this time, the pressure in the processing vessel 203 is measured by the pressure sensor 223, and the opening / closing of the APC valves 255 and 240 is feedback-controlled based on the measured pressure (pressure adjustment). The pressure in the processing container 203 is adjusted to a slightly reduced pressure, for example, 700 hPa to 1000 hPa.
- the wafer 200 accommodated in the processing container 203 is heated by the first heating unit 207 so as to be a predetermined first temperature, for example, 40 ° C. to 300 ° C., preferably 70 ° C. to 130 ° C.
- the power supplied to the heater units 207a to 207d is feedback-controlled based on the temperature information detected by the temperature sensors 263a to 263d so that the wafer 200 in the processing container 203 becomes the first temperature (temperature adjustment).
- all the set temperatures of the heater units 207a to 207d are controlled to be the same temperature.
- heating is performed by the second heating unit 280 so that the hydrogen peroxide gas is at a temperature at which the hydrogen peroxide gas is not re-liquefied in the processing container 203, particularly below the processing container (reaction tube) 203.
- the set temperature of the second heating unit 280 is, for example, 100 ° C. to 200 ° C.
- the boat rotation mechanism 267 is operated to start the rotation of the boat 217.
- the rotation speed of the boat 217 is controlled by the controller 121. Note that the boat 217 always maintains a rotated state until at least a reforming process step (S30) described later is completed.
- FIG. 6 shows an example in which the reforming process (S30) starts at 80 ° C., that is, an example when the first temperature is 80 ° C.
- valves 303a, 302a to 302d are opened with the valves 302h, 302j, and 302i closed.
- valves 303b and 302e to 302g are opened, and the pressurized gas is supplied from the pressurized gas supply source (not shown) into the reserve tank 301 while the flow rate is controlled by the MFC 309.
- the hydrogen peroxide solution stored in the reserve tank 301 is supplied into the processing container 203 through the processing liquid supply pipe 289 a, the processing liquid supply nozzle 501, and the supply hole 502 while controlling the flow rate by the LMFC 305.
- the flow rate of the hydrogen peroxide water is, for example, 1 cc / min to 30 cc / min, preferably 5 cc / min to 20 cc / min, and more preferably 10 cc / min.
- an inert gas such as nitrogen (N 2 ) gas or a rare gas such as He gas, Ne gas, or Ar gas can be used.
- the concentration of the hydrogen peroxide gas supplied into the processing container 203 varies depending on the thermal conditions of the processing liquid supply nozzle 501. There is a case. In this case, the concentration distribution of hydrogen peroxide in the processing vessel 203 may become unstable, and it may be difficult to perform substrate processing with high reproducibility. Further, when the concentration of hydrogen peroxide in the processing liquid supply nozzle 501 becomes high, the inside of the processing liquid supply nozzle 501 may be corroded. And the foreign material generated by corrosion may have a bad influence on substrate processing, such as film processing, for example. Therefore, in this embodiment, not hydrogen peroxide gas but hydrogen peroxide water is allowed to flow in the treatment liquid supply nozzle 501.
- the hydrogen peroxide solution supplied into the processing container 203 from the processing liquid supply nozzle 501 comes into contact with a vaporizer 217d as a heated vaporizing unit and is vaporized.
- hydrogen peroxide gas that is, hydrogen peroxide water gas
- a third heating unit may be provided on or around the vaporizer 217d to heat the vaporizer 217d.
- the hydrogen peroxide gas generated in the processing chamber 201 flows toward the first exhaust pipe 231 and is supplied to the surface of the wafer 200 in this process. As a result, an oxidation reaction occurs on the surface of the wafer 200, and the polysilazane film formed on the wafer 200 is modified to an SiO film.
- the processing chamber 201 is exhausted using the above-described second exhaust system so that the hydrogen peroxide contained in the exhaust gas is recovered. It may be.
- the APC valve 255 may be closed, the APC valve 240 may be opened, and the atmosphere in the processing container 203 may be exhausted through the second exhaust pipe 243.
- the exhaust gas flowing through the second exhaust pipe 243 is separated into a liquid containing hydrogen peroxide and a gas not containing hydrogen peroxide by the separator 244.
- the liquid containing hydrogen peroxide is recovered in the liquid recovery tank 247, and the gas not containing hydrogen peroxide is exhausted from the vacuum pump 246b.
- the APC valves 255 and 240 are closed or the opening degree thereof is reduced to contain the hydrogen peroxide gas in the processing container 203. You may make it pressurize. As a result, the concentration distribution of the hydrogen peroxide gas in the processing container 203 can be made uniform, and the uniformity of the modification process within the surface of the wafer 200 and the uniformity of the modification process between the wafers 200 can be respectively determined. It becomes possible to improve. In addition, by pressurizing the inside of the processing container 203, the above-described oxidation reaction can be promoted and the quality of the SiO film can be improved. In addition, it is possible to shorten the time required for the oxidation treatment and improve productivity.
- the supply of the oxygen-containing gas from the oxygen-containing gas supply unit 602 is started first, and the inside of the processing container 203 is kept in a slightly reduced pressure state. It is preferable to keep it.
- the flow rate (first flow rate) of the oxygen-containing gas can be, for example, 1 slm to 30 slm, preferably 5 slm to 20 slm, more preferably 10 to 20 slm.
- the processing container 203 It is also possible to suppress the generation of foreign matter in the processing container 203. Further, by starting the supply of the oxygen-containing gas into the processing container 203 before starting the supply of the hydrogen peroxide solution into the processing container 203, that is, before starting the generation of the hydrogen peroxide gas, It is possible to improve the uniformity of the modification process within the surface of the wafer 200 and the uniformity of the modification process between the wafers 200. In addition, the quality of the reforming process can be improved. This is because when the hydrogen peroxide gas is generated in a state where the oxygen-containing gas has not been supplied in advance, the processing on the wafer 200 provided on the upper portion of the processing vessel 203 and the lower portion of the processing vessel 203 are provided.
- the processing on the wafer 200 starts at a different timing, and the uniformity of the modification processing between the wafers 200 may be reduced.
- the processing on the peripheral portion in the wafer 200 surface and the processing on the central portion in the wafer 200 surface start at different timings, and the uniformity of the modification processing in the wafer 200 surface may be reduced. is there.
- the amount of foreign matter generated in the processing container 203 increases, and it may be difficult to control the film quality.
- these problems can be avoided by supplying the oxygen-containing gas into the processing vessel 203 in advance and maintaining the state in a slightly reduced pressure state.
- valve 302d is closed and the supply of hydrogen peroxide water into the processing vessel 203 is stopped. Further, the valves 602a and 601d are closed, and the supply of the oxygen-containing gas into the processing container 203 is also stopped.
- commercially available hydrogen peroxide water may contain acid or chloride as a stabilizer.
- impurities may be mixed in the commercially available hydrogen peroxide solution.
- impurities include Ag, Al, As, Au, B, Ba, Bi, Ca, Cd, Co, Cr, Cu, Fe, Ga, Ge, K, Li, Mg, Mn, Mi, Na, Ni, Examples include at least one element such as Pb, Sb, Si, Sn, Sr, Ta, Ti, V, Zn, and Zr.
- Impurities can be mixed, for example, when a container containing hydrogen peroxide water is transported, stored, or attached to a substrate processing apparatus.
- the amount of impurities to be mixed varies depending on whether or not the container is provided with a mechanism for preventing external impurities from being mixed. For example, an amount of about 0.1 ppm to 10 ppm is exemplified.
- the inventors have found that there is a possibility that foreign substances (particles) are generated by reacting these stabilizers and impurities with the solvent and impurities remaining in the polysilazane film, or polysilazane. Therefore, the inventors investigated the contents of stabilizers and impurities for high-purity hydrogen peroxide water and standard hydrogen peroxide water.
- the amount of stabilizers and impurities contained in high-purity hydrogen peroxide solution should be about half or less than the amount of stabilizers and impurities contained in standard hydrogen peroxide solution.
- the standard hydrogen peroxide solution contains 10 ppm or less of acid and 0.3 ppm or less of chloride
- the high purity hydrogen peroxide solution contains 5 ppm or less of acid and 0.02 ppm or less of chloride. I found out. A comparison result between the number of particles when the standard product is used and the number of particles when the high-purity product is used will be described later.
- the wafer 200 is heated to a predetermined second temperature that is equal to or lower than the processing temperature in the pre-baking step (T30).
- the second temperature is higher than the first temperature described above and is set to a temperature equal to or lower than the processing temperature of the pre-baking step (T30).
- the second temperature can be set to 150 ° C., for example. After the temperature rise, the temperature is maintained and the wafer 200 and the inside of the processing container 203 are gently dried.
- ammonia, ammonium chloride, carbon, hydrogen, which are byproducts separated from the polysilazane film, impurities such as outgas caused by the solvent, impurities caused by hydrogen peroxide, and the like are removed from the wafer 200. That is, it can be removed from the surface of the SiO film or in the SiO film. Further, reattachment of these substances to the wafer 200 can be suppressed.
- the flow rate of the oxygen-containing gas is preferable to set to a second flow rate higher than the first flow rate before or at the same time as raising the temperature of the wafer 200 to the second temperature.
- the second flow rate can be, for example, 10 slm to 40 slm.
- the impurity removal efficiency can be improved by increasing the flow rate of the oxygen-containing gas before raising the temperature of the wafer 200 to the second temperature.
- Post-bake process (S50) After the drying process (S40) is completed, the wafer 200 is heated to a temperature higher than the second temperature of the drying process (S40) and heat-treated in an atmosphere containing at least one of nitrogen, oxygen, and argon. .
- this post-bake treatment hydrogen remaining in the SiO film can be removed, and the SiO film can be modified into a high-quality film with a low hydrogen content. That is, the quality of the SiO film can be improved by performing the post-bake treatment.
- manufacturing throughput may be prioritized except for device processes that require high quality oxide film quality (eg, STI). In this case, the post-baking process does not have to be performed.
- the heat capacity in the processing container 203 can be increased, and the wafer 200 and the processing container 203 can be heated uniformly.
- the wafer 200 and the processing container 203 can be heated uniformly.
- particles, impurities, outgas from the wafer 200 and residual impurities contained in the hydrogen peroxide solution are removed from the processing container 203. Can be removed.
- the temperature is lowered to a predetermined temperature (for example, the insertion temperature of the wafer 200).
- the power supply to the second heating unit 280 is stopped and the temperature of the second heating unit 280 is lowered.
- the temperature decrease of the second heating unit 280 By starting the temperature decrease of the second heating unit 280 after the start of the temperature decrease of the wafer 200 described above, non-uniform film quality within the wafer 200 surface and non-uniform film quality between the wafers 200 can be prevented.
- particles generated in the processing container 203, impurities, outgas from the wafer 200, residual impurities contained in the hydrogen peroxide solution, and the like can be suppressed from adsorbing to the furnace port.
- the shutters 252, 254, and 256 may be opened while the blower 257 is operated while the temperature of the wafer 200 is lowered. Then, the cooling gas may be supplied from the cooling gas supply pipe 249 into the space 260 between the processing vessel 203 and the heat insulating member 210 while controlling the flow rate by the mass flow controller 251, and exhausted from the cooling gas exhaust pipe 253. .
- the cooling gas other than N 2 gas, for example, rare gas such as He gas, Ne gas, Ar gas, air, or the like can be used alone or in combination. Thereby, the inside of the space 260 can be rapidly cooled, and the processing container 203 and the first heating unit 207 provided in the space 260 can be cooled in a short time. Further, the temperature of the wafer 200 in the processing container 203 can be lowered in a shorter time.
- the cooling process described above may be performed by supplying the cooling gas from the cooling gas supply pipe 249 into the space 260 and filling the space 260 with the cooling gas in a state where the shutters 254 and 256 are closed. Thereafter, the shutters 254 and 256 may be opened with the blower 257 operated, and the cooling gas in the space 260 may be exhausted from the cooling gas exhaust pipe 253.
- Substrate unloading step (S70) Thereafter, the seal cap 219 is lowered by the boat elevator to open the lower end of the processing container 203, and the processed wafer 200 is held on the boat 217 from the lower end of the processing container 203 to the outside of the processing container 203 (processing chamber 201). Unload to (boat unload). Thereafter, the processed wafer 200 is taken out from the boat 217 (wafer discharge), and the substrate processing step of this embodiment is completed.
- the wafer 200 is generated on the wafer 200 by performing the drying process step (S40) at a temperature equal to or higher than the modification process temperature and equal to or lower than the temperature of the pre-bake process (T30). The number of particles to be reduced can be suppressed.
- FIG. 7 shows an example of a process sequence according to the prior art.
- FIG. 8 shows the results of measuring the number of particles on the wafer 200 processed under the conditions of FIGS. 6 and 7 respectively.
- the solid line indicates the temperature of the wafer 200
- the two-dot chain line indicates the pressure in the processing chamber 201.
- FIG. 6 shows an example in which the reforming process (S30) is performed at 80 ° C. and the drying process (S40) is performed at 150 ° C.
- FIG. 7 shows an example in which the reforming treatment step (S30) and the drying treatment step (S40) are performed at 80 ° C., respectively.
- FIG. 8 represents the number of particles on the wafer 200.
- the vertical axis in FIG. TOP, CNT, and BTM in FIG. 8 indicate that the processing position of the wafer 200, that is, the wafer 200 was placed on the upper portion, the central portion, and the lower portion of the boat 217.
- the temperatures (80 ° C. and 150 ° C.) shown in FIG. 8 indicate the temperature of the wafer 200 in the drying process (S40). According to FIG. 8, when the temperature of the drying process (S40) is set to 150 ° C., the number of particles can be reduced to a quarter or less compared to the case where the temperature of the drying process (S40) is set to 80 ° C. You can see that
- the wafer 200 can be dried while suppressing the reattachment of impurities to the wafer 200.
- a uniform drying process can be performed on each of the plurality of wafers 200 accommodated in the processing container 203 by gently drying the wafers 200 in the drying process step (S40).
- the process container 203 is evacuated while maintaining the temperature in the process container 203, whereby particles and impurities remaining in the process container 203 can be removed. .
- the temperature of the wafer 200 can be raised by returning to atmospheric pressure while maintaining the temperature in the processing container 203 after evacuation, and increasing the heat capacity in the processing container 203, and cannot be removed by evacuation. Particles, outgas from the wafer 200, and the like can be further removed.
- the number of particles can be further suppressed by increasing the concentration of the hydrogen peroxide solution as the treatment liquid used in the modification treatment step (S30).
- the “standard product” shown in FIG. 8 indicates that a standard hydrogen peroxide solution containing 10 ppm or less of acid and 0.3 ppm or less of chloride was used. This shows that a high-purity hydrogen peroxide solution containing 5 ppm or less of acid and 0.02 ppm or less of chloride was used. According to FIG. 8, when a high-purity product is used in the reforming process (S30), the number of particles is reduced to about one-half or less even under the same temperature conditions as compared with a standard product. You can see that it is made.
- the film density can be controlled by adjusting the supply ratio of hydrogen peroxide and oxygen-containing gas supplied into the processing vessel 203.
- the generation of particles can be suppressed by adjusting the supply ratio of hydrogen peroxide and oxygen-containing gas supplied into the processing vessel 203.
- the impurities can be efficiently removed by temporarily purging the inside of the processing vessel 203 with medium vacuum at the time of evacuation.
- the present invention is not limited to this. That is, if a gas obtained by vaporizing a solution (reactant in a liquid state) in which a raw material (reactant) that is solid or liquid at room temperature is dissolved in a solvent is used as the processing gas, hydrogen peroxide gas is used.
- the present invention is not limited to the case and can be suitably applied.
- the vaporization point of the raw material (reactant) is different from the vaporization point of the solvent, the effect of the above-described embodiment is easily obtained.
- the vaporized gas that is the processing gas is not limited to a gas whose concentration is increased when reliquefied, but may be a gas whose concentration decreases when reliquefied. Even with such a processing gas, if the above-described substrate processing apparatus is used and processing is performed in the same processing procedure as in the above-described embodiment, the concentration of the processing gas in the processing container is made uniform, and the reforming process is performed. It is possible to improve the uniformity within the substrate surface and the uniformity between the substrates.
- a gas containing hydrogen element (H) such as hydrogen (H 2 ) gas (hydrogen-containing gas) and an oxygen element such as oxygen (O 2 ) gas (such as oxygen (O 2 ) gas).
- H hydrogen
- O 2 oxygen
- Steam (H 2 O) gas obtained by reacting a gas containing O) (oxygen-containing gas) or the like may be used.
- water vapor generated by heating water (H 2 O) can also be used.
- oxygen-containing gas in addition to O 2 gas, for example, ozone (O 3 ) gas, water vapor (H 2 O), or the like may be used.
- hydrogen peroxide has a high activation energy compared to water vapor (water, H 2 O), and has a feature of strong oxidizing power because of a large number of oxygen atoms contained in one molecule. Therefore, when hydrogen peroxide gas is used as the processing gas, it is advantageous in that the oxidation treatment can be performed up to the deep part of the film formed in the groove on the substrate surface (bottom part of the groove). Further, when hydrogen peroxide gas is used as the processing gas, the reforming process can be performed at a low temperature of 40 ° C. to 150 ° C., and the circuit element formed on the substrate, in particular, a material that is vulnerable to high temperature processing (for example, aluminum It is advantageous in that the deterioration of the performance of the circuit element using) can be suppressed.
- the processing gas may include a state of a single H 2 O 2 molecule or a cluster state in which several molecules are bonded. Further, when hydrogen peroxide water is vaporized to generate hydrogen peroxide gas, it may be decomposed to a single H 2 O 2 molecule, or a cluster state in which several molecules are kept bonded. You may make it decompose
- a gas water vaporized gas obtained by vaporizing water (H 2 O)
- the state of the H 2 O molecule alone or a cluster state in which several molecules are bonded in the processing gas. May be included.
- water (H 2 O) is vaporized from a liquid state to a gas state, it may be decomposed to a single H 2 O molecule, or it may be decomposed to a cluster state in which several molecules remain bonded. You may make it make it.
- a fog (mist) state in which several clusters described above are gathered may be used as the processing gas.
- the present invention is not limited to this. That is, when processing a substrate on which a film having a silazane bond (—Si—N—) is processed, the same effect as in the above embodiment can be obtained even if the film is not a polysilazane film.
- external temperature sensors 264a to 264d such as thermocouples are used as temperature detectors for detecting the temperatures of the heater units 207a to 207d provided in the first heating unit 207 outside the processing vessel 203, for example. (See FIG. 2) may be installed.
- an annealing step in which, for example, the wafer 200 is heated to a high temperature of 800 ° C. to 1000 ° C. may be performed between the drying treatment step (S40) and the temperature lowering / atmospheric pressure return step (S60).
- the cooling gas may be supplied into the space 260 in the temperature lowering / atmospheric pressure return step (S60).
- the processing container 203 and the 1st heating part 207 can be cooled in a shorter time, the start time of the next modification
- the substrate processing apparatus including the vertical processing furnace has been described.
- the present invention is not limited to this.
- a substrate processing apparatus having a single-wafer type, Hot Wall type, Cold Wall type processing furnace, or a processing gas is used.
- the present invention can also be suitably applied to a substrate processing apparatus that processes the wafer 200 by being excited.
- the present invention is not limited to this.
- hydrogen peroxide gas previously vaporized outside the processing container 203 may be supplied into the processing container 203.
- FIG. 9 is a schematic configuration diagram of a substrate processing apparatus according to another embodiment described above.
- hydrogen peroxide gas which is a processing gas
- FIG. 9 the same components as those in the first embodiment are denoted by the same reference numerals.
- a gas supply nozzle 701 is disposed in the processing container 203 along the arrangement direction of the wafers 200.
- a plurality of gas supply holes 702 are provided on the side of the gas supply nozzle 701 so as to correspond to each of the wafers 200, for example.
- a gas supply pipe 933 that supplies hydrogen peroxide gas is connected to the upstream end of the gas supply nozzle 701.
- the gas supply pipe 933 is provided with a hydrogen peroxide gas generator 707 and an auto valve 909 in order from the upstream side.
- a hydrogen peroxide solution supply pipe 932d is connected to the hydrogen peroxide gas generator 707.
- the hydrogen peroxide solution supply pipe 932d is provided with a hydrogen peroxide solution source 940d, a liquid flow rate controller (LMFC) 941d, and an auto valve 942d in this order from the upstream side.
- the gas supply pipe 933 is connected to an inert gas supply pipe 932 c that supplies an inert gas such as N 2 gas.
- the inert gas supply pipe 932c is provided with an inert gas supply source 940c, an MFC 941c, and a valve 942c in this order from the upstream side.
- the hydrogen peroxide gas supply system 90 is mainly configured by the gas supply pipe 933, the hydrogen peroxide gas generator 707, the hydrogen peroxide water supply pipe 932d, the auto valves 933 and 942d, and the LMFC 941d.
- the gas supply nozzle 701 and the hydrogen peroxide water source 940d may be included in the hydrogen peroxide gas supply system.
- an inert gas supply system is mainly configured by the inert gas supply pipe 932c, the MFC 941c, and the valve 942c.
- the inert gas supply source 940c may be included in the inert gas supply system.
- the inert gas supply system may be included in the hydrogen peroxide gas supply system 90.
- the auto valve 942d is opened, and the hydrogen peroxide solution whose flow rate is adjusted by the LMFC 941d is supplied to the hydrogen peroxide gas generator 707. Then, the hydrogen peroxide gas is generated by vaporizing the hydrogen peroxide solution with the hydrogen peroxide gas generator 707. In this state, by opening the auto valve 909, the hydrogen peroxide gas can be supplied into the processing container 203, that is, to the wafer 200 through the gas supply nozzle 701.
- the hydrogen peroxide gas passes through the gas supply pipe 933 or the gas supply nozzle 701, it may be reliquefied.
- the hydrogen peroxide gas often accumulates and reliquefies at a curved (bent) portion or a joining portion of the gas supply pipe 933 or the gas supply nozzle 701.
- liquid in the gas supply pipe 933 or the gas supply nozzle 701 may be damaged by the liquid that has been reliquefied in the gas supply pipe 933 or the gas supply nozzle 701. Therefore, it is necessary to heat the gas supply pipe 933 and the gas supply nozzle 701 by providing a heater.
- hydrogen peroxide is supplied into the processing container 203 in a liquid state, which is preferable in that a heater is unnecessary.
- a substrate processing method is provided.
- ⁇ Appendix 2> The substrate processing method according to appendix 1, preferably, Supplying a processing liquid into the processing container; And evaporating the processing liquid with a vaporizer in the processing container to generate the processing gas.
- ⁇ Appendix 3> The substrate processing method according to Supplementary Note 1 or Supplementary Note 2, preferably, Supplying an oxygen-containing gas at a first flow rate to the substrate in the reforming step; Prior to the drying treatment step, the oxygen-containing gas is set to a second flow rate higher than the first flow rate.
- ⁇ Appendix 4> The substrate processing method according to any one of supplementary notes 1 to 3, preferably, After the drying treatment step, there is a step of evacuating the inside of the treatment container at the second temperature.
- Appendix 5 The substrate processing method according to appendix 4, preferably, A step of evacuating the processing container at atmospheric pressure after the evacuation;
- the substrate processing method according to any one of supplementary notes 1 to 5, preferably, The processing gas is hydrogen peroxide gas.
- ⁇ Appendix 8> The substrate processing method according to any one of supplementary notes 1 to 5, preferably, The first temperature is 70 ° C. to 130 ° C.
- a substrate processing apparatus is provided.
- the substrate processing apparatus preferably, The processing gas supply unit A processing liquid supply section for supplying a processing liquid into the processing container; A vaporizing section that vaporizes the processing liquid in the processing container to generate a processing gas.
- the substrate processing apparatus according to appendix 10 or appendix 11, preferably, An oxygen-containing gas supply unit for supplying an oxygen-containing gas into the processing container;
- the control unit supplies the oxygen-containing gas at a first flow rate when the substrate is subjected to the modification treatment, Before the drying process, the gas supply unit is controlled to increase to a second flow rate higher than the first flow rate.
- a method of manufacturing a semiconductor device having the above is provided.
- Appendix 14 A method for manufacturing a semiconductor device according to appendix 13, preferably, Supplying a processing liquid into the processing container; And evaporating the processing liquid with a vaporizer in the processing container to generate the processing gas.
- a procedure for carrying a substrate in which a film having a silazane bond is formed and prebaked on the film into a processing container A modification treatment procedure for heating the substrate to a first temperature and supplying a treatment gas to the substrate;
- Appendix 16> The program according to appendix 15, or a computer-readable recording medium on which the program is recorded, Supplying a treatment liquid into the treatment container; Causing the computer to execute a procedure of generating the processing gas by vaporizing the processing liquid with a vaporizer in the processing container.
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Abstract
Description
シラザン結合を有する膜が形成され、当該膜にプリベークが施されている基板を処理容器内に搬入する工程と、前記基板を第1温度に加熱して当該基板に処理ガスを供給する改質処理工程と、前記基板を前記第1温度より高く、前記プリベーク時の温度以下の第2温度で加熱する乾燥処理工程と、を有する基板処理方法が提供される。
シラザン結合を有する膜が形成され、当該膜にプリベークが施されている基板を収容する処理容器と、前記基板に処理ガスを供給する処理ガス供給部と、前記基板を加熱する加熱部と、前記基板を第1温度に加熱するとともに前記処理ガスを前記基板に供給して、前記シラザン結合を有する膜を改質処理した後に、当該第1温度よりも高く、前記プリベーク時の温度以下の第2温度に前記基板を加熱する様に、前記処理ガス供給部と前記加熱部を制御する制御部と、を有する基板処理装置が提供される。
シラザン結合を有する膜が形成され、当該膜にプリベークが施されている基板を処理容器内に搬入する工程と、前記基板を第1温度に加熱して当該基板に処理ガスを供給する改質処理工程と、前記基板を前記第1温度より高く、前記プリベーク時の温度以下の第2温度で加熱する乾燥処理工程と、を有する半導体装置の製造方法が提供される。
シラザン結合を有する膜が形成され、当該膜にプリベークが施されている基板を処理容器内に搬入する手順と、前記基板を第1温度に加熱して当該基板に処理ガスを供給する改質処理手順と、前記基板を前記第1温度より高く、前記プリベーク時の温度以下の第2温度で加熱する乾燥処理手順と、をコンピュータに実行させるプログラムを記録したコンピュータ読み取り可能な記録媒体が提供される。
以下、本発明の好ましい実施の形態の一つである第1の実施形態について、図面を参照してより詳細に説明する。
まず、本実施形態に係る基板処理装置の構成について、主に図1及び図2を用いて説明する。図1は、本実施形態に係る基板処理装置の概略構成図であり、処理炉202部分を縦断面で示している。図2は、本実施形態に係る基板処理装置が備える処理炉202の縦断面概略図である。
図1に示すように、処理炉202は処理容器(反応管)203を備えている。処理容器203は、例えば石英(SiO2)または炭化シリコン(SiC)等の耐熱性材料からなり、上端及び下端が開口した円筒形状に形成されている。処理容器(反応管)203の筒中空部には、処理室201が形成されている。処理室201は、基板としてのウエハ200を、後述するボート217によって水平姿勢で垂直方向に多段に整列した状態で収容可能に構成されている。
基板支持部(基板保持部)としてのボート217は、複数枚のウエハ200を多段に保持できるように構成されている。ボート217は、複数枚のウエハ200を保持する複数本の支柱217aを備えている。支柱217aは例えば3本備えられている。複数本の支柱217aは、それぞれ、底板217bと天板217cとの間に架設されている。複数枚のウエハ200は、支柱217aにより、水平姿勢で、かつ、互いに中心を揃えた状態で整列させられ、管軸方向に多段に保持されるように構成されている。天板217cの外径は、ボート217に保持されるウエハ200の最大外径よりも大きくなるように形成されている。
処理容器203の下方には、ボート217を昇降させて処理容器203の内外へ搬送する昇降部としてのボートエレベータが設けられている。ボートエレベータには、ボートエレベータによりボート217が上昇された際に炉口を封止するシールキャップ219が設けられている。
処理容器203の外側には、処理容器203の側壁面を囲う同心円状に、処理容器203内のウエハ200を加熱する第1の加熱部207が設けられている。第1の加熱部207は、ヒータベース206により支持されて設けられている。図2に示すように、第1の加熱部207は、第1~第4のヒータユニット207a~207dを備えている。ヒータユニット207a~207dはそれぞれ、処理容器203内におけるウエハ200の配列方向に沿って設けられている。
図1,図2に示すように、処理容器203と第1の加熱部207との間には、処理液供給ノズル501が設けられている。処理液供給ノズル501は、例えば熱伝導率の低い石英等により形成されている。処理液供給ノズル501は二重管構造を有していてもよい。処理液供給ノズル501は、処理容器203の外壁の側部に沿って配設されている。処理液供給ノズル501の先端(下流端)は、処理容器203の頂部(上端開口)に気密に接続されている。処理容器203の上端開口に接続された処理液供給ノズル501の先端には、供給孔502が設けられている。供給孔502は、処理液供給ノズル501内を流れる処理液を、処理容器203内に収容されたボート217の上部に設けられた気化器217dに向かって供給するように構成されている。後述の例では、供給孔502は、気化器217dに向けて処理液を滴下するように構成されている。ただし、供給孔502の構成はこのような態様に限定されず、例えば、供給孔502から気化器201dに向けて処理液を噴射するように構成してもよい。ガス供給部は、主に、気化部としての気化器217d、処理液供給ノズル501、および、処理液供給部としての供給孔502で構成されている。
液体流量制御ユニット300は、処理液を供給する流体管310aを備えている。液体管310aの下流端は、処理液供給管289aの上流端に接続されている。流体管310aには、上流側から順に、リザーブタンク301、オートバルブ302a、ハンドバルブ303a、フィルタ304、オートバルブ302b、液体流量コントローラ(LMFC)305、バルブ302c,302dが設けられている。液体管310aの上流端は、リザーブタンク301内に貯留された処理液の液面以下に位置するように設けられている。リザーブタンク301には、圧送ガス供給部、ガス排出部、処理液排出部が接続されている。リザーブタンク301の容量は1~5リットルとするのが好ましく、例えば2リットルとすることができる。リザーブタンク301の容量は、後述の基板処理工程が2回以上連続で実行できる容量とするのが好ましい。
処理容器203の下方には、処理室201内のガスを排気する第1の排気管231の上流端が接続されている。第1の排気管231には、上流側から順に、圧力調整器としてのAPC(Auto Pressure Controller)バルブ255、真空ポンプ(排気装置)246aが設けられている。第1の排気管231におけるAPCバルブ255の上流側には、第2の排気管243が接続されている。第2の排気管243には、上流側から順に、APCバルブ240、分離器244、真空ポンプ(排気装置)246bが設けられている。分離器244には、液体回収タンク247が接続されている。
後述する基板処理工程において、反応物として例えば過酸化水素を用い、処理ガスとして例えば過酸化水素ガスを用いる場合、過酸化水素ガスが、処理容器203内で過酸化水素の気化点よりも低い温度に冷却され、再液化してしまう可能性がある。なお、過酸化水素ガスとは、例えば、液体状態の過酸化水素である過酸化水素水を、気化またはミスト化させたものをいう。
図3に示すように、制御部(制御手段)であるコントローラ121は、CPU(Central Processing Unit)121a、RAM(Random Access Memory)121b、記憶装置121c、I/Oポート121dを備えたコンピュータとして構成されている。RAM121b、記憶装置121c、I/Oポート121dは、内部バス121eを介して、CPU121aとデータ交換可能なように構成されている。コントローラ121には、例えばタッチパネル等として構成された入出力装置122が接続されている。
ここで、基板としてのウエハ200に対して後述の基板処理工程を施す前に行われる事前処理工程について、図4を用いて説明する。
続いて、本実施形態に係る半導体装置の製造工程の一工程として実施される基板処理工程について、図5、図6を用いて説明する。この工程は、上述の基板処理装置により実施される。本実施形態では、この基板処理工程の一例として、処理ガスとして過酸化水素ガスを用い、基板としてのウエハ200上に形成されたシリコン含有膜をシリコン酸化膜(SiO膜)に改質(酸化)する工程(改質処理工程)を行う場合について説明する。なお、以下の説明において、基板処理装置を構成する各部の動作は、コントローラ121により制御される。
まず、予め指定された枚数のウエハ200をボート217に装填(ウエハチャージ)する。そして、複数枚のウエハ200を保持したボート217を、ボートエレベータによって持ち上げて処理容器203内(処理室201内)に搬入(ボートロード)する。この状態で、処理炉202の開口部である炉口は、シールキャップ219によりシールされた状態となる。
処理容器203内が所望の圧力(真空度)となるように、真空ポンプ246a,246bの少なくともいずれかによって真空排気する。また、バルブ602a,601dを開き、酸素含有ガス供給部602から処理容器203内へ酸素含有ガスを供給する。好ましくは、酸素含有ガスを、ガス加熱部602eで例えば100℃~120℃に加熱した後に供給する。この際、処理容器203内の圧力は、圧力センサ223で測定し、この測定した圧力に基づきAPCバルブ255,240の開閉をフィードバック制御する(圧力調整)。処理容器203内の圧力は、微減圧状態、例えば700hPa~1000hPaに調整する。
ウエハ200が所定の第1温度に到達し、ボート217が所望の回転速度に到達したら、処理液供給管289a、処理液供給ノズル501を介した処理容器203内への過酸化水素水の供給を開始する。図6に、改質処理工程(S30)を80℃で開始する例、すなわち、第1温度を80℃としたときの例を示す。
改質処理工程(S30)が終了した後、ウエハ200を、上述のプリベーク工程(T30)での処理温度以下の所定の第2温度に昇温させる。第2温度は、上述の第1温度よりも高い温度であって、プリベーク工程(T30)の処理温度以下の温度に設定する。第2温度は、例えば150℃とすることができる。昇温後、温度を保持して、ウエハ200と処理容器203内とを緩やかに乾燥させる。このように乾燥させることにより、ポリシラザン膜から離脱した副生成物であるアンモニア、塩化アンモニウム、炭素、水素の他、溶媒に起因するアウトガス等の不純物、過酸化水素に起因する不純物等を、ウエハ200から、すなわち、SiO膜中やSiO膜の表面から除去することができる。また、これらの物質のウエハ200への再付着を抑制することもできる。
乾燥処理工程(S40)が終了した後、ウエハ200を乾燥処理工程(S40)の第2温度よりも高温に昇温させ、窒素、酸素、又はアルゴンの少なくとも1つ以上を含む雰囲気下で熱処理する。このポストベーク処理により、SiO膜中に残存している水素を除去することができ、SiO膜を、水素の含有量の少ない良質な膜に改質することができる。すなわち、ポストベーク処理を行うことで、SiO膜の品質を向上させることができる。但し、高品質の酸化膜質が要求されるデバイス工程(例えばSTI等)以外では、製造スループットを優先させる場合がある。この場合には、ポストベーク処理を行わなくてもよい。
乾燥処理工程(S40)またはポストベーク工程(S50)が終了した後、APCバルブ255,240の少なくともいずれかを開き、処理容器(反応管)203内を真空排気する。これにより、処理容器203内に残存するパーティクルや不純物を除去することができる。真空排気後、APCバルブ255,240の少なくともいずれかを閉じ、パージガス供給部601から処理容器203内にN2ガス等の不活性ガスを供給し、処理容器203内の圧力を大気圧に復帰させる。大気圧に復帰させることで、処理容器203内の熱容量を増加させることができ、ウエハ200と処理容器203とを均一に加熱することができる。ウエハ200と処理容器203とを均一に加熱することで、真空排気で除去できなかったパーティクル、不純物、ウエハ200からのアウトガスおよび過酸化水素水に含まれていた残留不純物を、処理容器203内から除去することができる。処理容器203内の圧力が大気圧になり、所定時間経過した後、所定の温度(例えばウエハ200の挿入温度程度)に降温させる。
その後、ボートエレベータによりシールキャップ219を下降させて処理容器203の下端を開口するとともに、処理済みウエハ200をボート217に保持した状態で処理容器203の下端から処理容器203(処理室201)の外部へ搬出(ボートアンロード)する。その後、処理済みウエハ200をボート217より取り出し(ウエハディスチャージ)、本実施形態の基板処理工程を終了する。
本実施形態によれば、以下に示す1つまたは複数の効果が得られる。
以上、本発明の実施形態を具体的に説明したが、本発明は上述の実施形態に限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能である。
以下に、本発明の好ましい態様について付記する。
一態様によれば、
シラザン結合を有する膜が形成され、当該膜にプリベークが施されている基板を処理容器内に搬入する工程と、
前記基板を第1温度に加熱して当該基板に処理ガスを供給する改質処理工程と、
前記基板を前記第1温度より高く、前記プリベーク時の温度以下の第2温度で加熱する乾燥処理工程と、
を有する基板処理方法が提供される。
付記1に記載の基板処理方法であって好ましくは、
前記処理容器内に処理液を供給する工程と、
前記処理容器内の気化器で前記処理液を気化させて前記処理ガスを発生させる工程と、を更に有する。
付記1又は付記2に記載の基板処理方法であって好ましくは、
前記改質処理工程において前記基板に酸素含有ガスを第1流量で供給し、
前記乾燥処理工程の前に、前記酸素含有ガスを前記第1流量よりも多い第2流量にする。
付記1乃至付記3のいずれかに記載の基板処理方法であって、好ましくは、
前記乾燥処理工程の後に、前記処理容器内を前記第2温度で真空排気する工程を有する。
付記4に記載の基板処理方法であって、好ましくは、
前記真空排気の後に前記処理容器内を大気圧で排気する工程を有する。
付記1乃至付記5のいずれかに記載の基板処理方法であって、好ましくは、
前記処理ガスは、過酸化水素ガスである。
付記1乃至付記6のいずれかに記載の基板処理方法であって、好ましくは、
前記処理液は、過酸化水素を含む。
付記1乃至付記5のいずれかに記載の基板処理方法であって、好ましくは、
前記第1温度は、70℃~130℃である。
付記1乃至付記6のいずれかに記載の基板処理方法であって、好ましくは、
前記第2温度は80℃~150℃である。
他の態様によれば、
シラザン結合を有する膜が形成され、当該膜にプリベークが施されている基板を収容する処理容器と、
前記基板に処理ガスを供給する処理ガス供給部と、
前記基板を加熱する加熱部と、
前記基板を第1温度に加熱するとともに前記処理ガスを前記基板に供給して、前記シラザン結合を有する膜を改質処理した後に、当該第1温度よりも高く、前記プリベーク時の温度以下の第2温度に前記基板を加熱する様に、前記処理ガス供給部と前記加熱部を制御する制御部と、
を有する基板処理装置が提供される。
付記10に記載の基板処理装置であって、好ましくは、
前記処理ガス供給部は、
前記処理容器内に処理液を供給する処理液供給部と、
前記処理容器内で前記処理液を気化させて処理ガスを発生させる気化部と、を有する。
付記10又は付記11に記載の基板処理装置であって、好ましくは、
前記処理容器内に酸素含有ガスを供給する酸素含有ガス供給部を有し、
前記制御部は、前記基板を前記改質処理するときに前記酸素含有ガスを第1流量で供給し、
前記乾燥処理する前に前記第1流量よりも多い第2流量に増加させるよう前記ガス供給部を制御する。
他の態様によれば、
シラザン結合を有する膜が形成され、当該膜にプリベークが施されている基板を処理容器内に搬入する工程と、
前記基板を第1温度に加熱して当該基板に処理ガスを供給する改質処理工程と、
前記基板を前記第1温度より高く、前記プリベーク時の温度以下の第2温度で加熱する乾燥処理工程と、
を有する半導体装置の製造方法が提供される。
付記13に記載の半導体装置の製造方法であって、好ましくは、
前記処理容器内に処理液を供給する工程と、
前記処理容器内の気化器で前記処理液を気化させて前記処理ガスを発生させる工程と、を更に有する。
更に他の態様によれば、
シラザン結合を有する膜が形成され、当該膜にプリベークが施されている基板を処理容器内に搬入する手順と、
前記基板を第1温度に加熱して当該基板に処理ガスを供給する改質処理手順と、
前記基板を前記第1温度より高く、前記プリベーク時の温度以下の第2温度で加熱する乾燥処理手順と、をコンピュータに実行させるプログラム、または、該プログラムを記録したコンピュータ読み取り可能な記録媒体が提供される。
付記15に記載のプログラム、または、該プログラムを記録したコンピュータ読み取り可能な記録媒体であって、好ましくは、
前記処理容器内に処理液を供給する手順と、
前記処理容器内の気化器で前記処理液を気化させて前記処理ガスを発生させる手順と、をコンピュータに実行させる。
203 処理容器(反応管)
217 ボート
217d 気化器(気化部)
219 シールキャップ
207 第1の加熱部
280 第2の加熱部
300 液体流量制御ユニット
501 処理液供給ノズル
502 供給孔(処理液供給部)
231 ガス排気管
121 コントローラ(制御部)
Claims (11)
- シラザン結合を有する膜が形成され、当該膜にプリベークが施されている基板を処理容器内に搬入する工程と、
前記基板を第1温度に加熱して当該基板に処理ガスを供給する改質処理工程と、
前記基板を前記第1温度より高く、前記プリベーク時の温度以下の第2温度で加熱する乾燥処理工程と、
を有する基板処理方法。 - 前記処理容器内に処理液を供給する工程と、
前記処理容器内の気化器で前記処理液を気化させて前記処理ガスを発生させる工程と、
を更に有する請求項1記載の基板処理方法。 - 前記改質処理工程において、
前記基板に酸素含有ガスを第1流量で供給し、
前記乾燥処理工程の前もしくは開始と同時に、前記基板に供給される前記酸素含有ガスの流量を前記第1流量よりも多い第2流量にする、
請求項1記載の基板処理方法。 - 前記乾燥処理工程の後に、前記処理容器内を前記第2温度で真空排気する工程と、
前記真空排気する工程の後に、前記処理容器内を大気圧で排気する工程を有する、
請求項1記載の基板処理方法。 - 前記処理ガスは過酸化水素ガスである、
請求項1記載の基板処理方法。 - シラザン結合を有する膜が形成され、当該膜にプリベークが施されている基板を処理容器内に搬入する工程と、
前記基板を第1温度に加熱して当該基板に処理ガスを供給する改質処理工程と、
前記基板を前記第1温度より高く、前記プリベーク時の温度以下の第2温度で加熱する乾燥処理工程と、
を有する半導体装置の製造方法。 - 前記処理容器内に処理液を供給する工程と、
前記処理容器内の気化器で前記処理液を気化させて前記処理ガスを発生させる工程と、
を更に有する請求項6記載の半導体装置の製造方法。 - シラザン結合を有する膜が形成され、当該膜にプリベークが施されている基板を収容する処理容器と、
前記基板に処理ガスを供給する処理ガス供給部と、
前記基板を加熱する加熱部と、
前記基板を第1温度に加熱するとともに前記処理ガスを前記基板に供給して、前記シラザン結合を有する膜を改質処理した後に、当該第1温度よりも高く、前記プリベーク時の温度以下の第2温度に前記基板を加熱する様に、前記処理ガス供給部と前記加熱部を制御する制御部と、
を有する基板処理装置。 - 前記処理ガス供給部は、
前記処理容器内に処理液を供給する処理液供給部と、
前記処理容器内で前記処理液を気化させて処理ガスを発生させる気化部と、
を有する請求項8記載の基板処理装置。 - シラザン結合を有する膜が形成され、当該膜にプリベークが施されている基板を処理容器内に搬入する手順と、
前記基板を第1温度に加熱して当該基板に処理ガスを供給する改質処理手順と、
前記基板を前記第1温度より高く、前記プリベーク時の温度以下の第2温度で加熱する乾燥処理手順と、
をコンピュータに実行させるプログラムを記録したコンピュータ読み取り可能な記録媒体。 - 前記処理容器内に処理液を供給する手順と、
前記処理容器内の気化器で前記処理液を気化させて前記処理ガスを発生させる手順と、
をコンピュータに実行させるプログラムを記録した請求項10に記載のコンピュータ読み取り可能な記録媒体。
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